[1]陈社明,刘宏伟,马震,等.基于三维变密度流模拟的潍坊北部沿海区海(咸)水入侵研究[J].自然灾害学报,2020,29(03):203-212.[doi:10.13577/j.jnd.2020.0322]
 CHEN Sheming,LIU Hongwei,MA Zhen,et al.The research of sea-salted water intrusion in the northern coastal areas of Weifang city based on three-dimensional variable density flow simulation[J].,2020,29(03):203-212.[doi:10.13577/j.jnd.2020.0322]
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基于三维变密度流模拟的潍坊北部沿海区海(咸)水入侵研究
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
29
期数:
2020年03期
页码:
203-212
栏目:
出版日期:
2020-06-28

文章信息/Info

Title:
The research of sea-salted water intrusion in the northern coastal areas of Weifang city based on three-dimensional variable density flow simulation
作者:
陈社明 刘宏伟 马震 郭旭 杜东 王威 苗晋杰
中国地质调查局天津地质调查中心, 天津 300170
Author(s):
CHEN Sheming LIU Hongwei MA Zhen GUO Xu DU Dong WANG Wei MIAO Jinjie
Tianjin Center, China Geological Survey, Tianjin 300170, China
关键词:
海(咸)水入侵变密度流数值模拟防治方案优选
Keywords:
sea-salted water intrusionvariable density flownumerical simulationprevention schemes optimization
分类号:
P512.2+2P76X43
DOI:
10.13577/j.jnd.2020.0322
摘要:
莱州湾南岸是我国海(咸)水入侵地质灾害较严重的地区之一。为研究海(咸)水入侵过程,优选合理的防治方案,本文采用三维变密度数值模拟方法,对潍坊市北部沿海区海咸水入侵过程进行模拟,并利用实测的水位与TDS(Total Dissolved Solids)浓度数据对模型进行识别验证;然后,利用数值模型分析未来50年不同方案的防治效果,确定最优的海(咸)水入侵防治方案。研究结果表明:潍坊市北部沿海区地下水流场已由天然场逐渐转变为人工场,人类活动对地下水流场的影响越来越大;区内地下水流场存在2个淡水漏斗区,1个卤水漏斗区,以及漏斗之间的分水岭区域,地下水流向均是向漏斗中心汇流;未来50年,4种防治方案下海咸水入侵界线均向北回缩,回缩距离在500-8 000 m之间;通过4种防治方案对比发现,减少淡水开采量引起海(咸)水入侵界线向北回缩的距离更大,防治效果最优。
Abstract:
The southern coast of Laizhou Bay is one of the most serious geological disaster areas with sea-salted water intrusion in China. In order to study the process of sea-salted water intrusion, optimize the reasonable schemes for preventing seawater intrusion, the sea-salted water intrusion process was simulated by the variable density simulation method with 3D in northern coastal area of Weifang City, and the model was verified by the measured water level and TDS (Total Dissolved Solids)concentration. Furthermore, the numerical simulation was used to analyze the effect of different schemes in the next 50 years, and determine the optimal prevention schemes. The results showed that the natural groundwater flow field had gradually transformed into artificial field, and the influence of human activities on the flow field increased in the study area. It also demonstrated that there were two fresh water depression cones, and one brine depression cone, which were divided by watershed, and direction of groundwater flow was convergence to the funnel center. In next 50 years, the flow characteristics will not change fundamentally in the four kinds of prevention schemes, and the line of intrusion will rebound northward with the distance ranging from 500 to 8000m. Through the comparison of the four prevention schemes, it proved that the retraction distance caused by reducing exploitation of fresh water was the largest, which was the best prevention scheme.

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备注/Memo

备注/Memo:
收稿日期:2018-08-06;改回日期:2020-04-02。
基金项目:地质大调查项目-莱州湾地质环境调查评价(12120113003800);地质大调查项目-滦河流域水文地质调查(DD20190338)
作者简介:陈社明(1985-),男,高级工程师,博士,主要从事水资源及水文地质方面的研究.E-mail:tjdzdczx2013@126.com
更新日期/Last Update: 1900-01-01